Major Questions, Nondelegation, and the Section 338 Tariffs Against Canada

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Cite

Somin, I. (2026, September 14). Major Questions, Nondelegation, and the Section 338 Tariffs Against Canada. Reason. https://reason.com/volokh/2026/09/13/major-questions-nondelegation-and-the-section-338-tariffs-against-canada/

Dated when The Aporia collected the article, usually within hours of publication. Check the original for its exact date and byline.

Reason · collected 2026-09-14 · by Ilya Somin

Quick Summary

Law professors discuss how President Trump's use of Section 338 tariffs against Canadian imports may be illegal based on the major questions and nondelegation doctrines. The article argues that Section 338, which has never been used before, could allow for unlimited presidential discretion in imposing tariffs, violating principles of clear congressional authorization for significant economic decisions. This critique is bolstered by recent cases where similar expansive interpretations of executive power were struck down due to lack of clear legislative mandate and excessive delegation of authority.
Written by AI on 2026-09-14, from this article's own text only (the story summary below draws on all the coverage).

AI analysis

Story summary

In September 2025, U.S. President Donald Trump imposed new tariffs and bans on Canadian imports as part of an escalating trade war between the two nations. The measures included a 50% tariff on goods like metal and paper products, representing about 0.6% of total U.S. imports from Canada, while lifting tariffs on items such as salt, cement, and toilet paper. Trump also banned Canadian alcoholic drinks, whey, molasses, furniture, and other products effective September 29. In retaliation for these actions, Canada imposed its own tariffs on about $20 billion worth of American goods in October. These moves have prompted China to court Canada more closely, with Prime Minister Mark Carney making state visits to China and India to diversify trade relations. The legal validity of Trump's tariff measures under Section 338 is being challenged based on the major questions doctrine, which limits executive overreach without clear statutory authorization.

Written for “US Tariff Policy Against Canada” on 2026-10-29, grounded in this article and the 10 other(s) covering the same event.

Story

📰 US Tariff Policy Against Canada
Politics · 11 article(s) covering the same event. Compare every outlet's account →

Compared with similar articles

This article reads leans strongly left and hedges 7% of its claims. Each row says how that neighbour differs.
The Globe and Mail
Hedges 0 of 11 claims Outlet record 52/100
“The articles discuss different aspects of the tariffs issue; Article A focuses on legal analysis of Section 338 tariffs, while Article B reports on Ontario's response to new U.S. tariff announcements affecting Canadian businesses.”
National Post
⚖️ Leans right further right than this Hedges 5 of 33 claims Outlet record 60/100
“The articles discuss different aspects of U.S.-Canada trade relations and do not describe the same specific incident.”
National Post
Hedges 2 of 5 claims Outlet record 60/100
“The articles discuss different aspects of the trade conflict between Canada and the U.S., with Article A focusing on broader economic realities and emotions in dealing with Trump, while Article B focuses specifically on legal analysis of Section 338 tariffs.”
Reason
Hedges 2 of 25 claims Outlet record 67/100
“Article A discusses legal doctrines against Section 338 tariffs, while Article B announces a new amicus brief regarding Section 301 tariffs. Though both involve tariff-related legal challenges initiated by Trump, they describe distinct events.”
The Globe and Mail
⚖️ Leans right further right than this Hedges 1 of 41 claims Outlet record 52/100
Semafor
⚖️ Leans right further right than this Hedges 0 of 6 claims Outlet record 60/100
Semafor
⚖️ Leans right further right than this Hedges 1 of 3 claims Outlet record 60/100
“Article A discusses the legality and background of tariffs imposed by Trump against Canada, while Article B reports on Canada's retaliatory tariffs taking effect in response to US actions.”
Global News
⚖️ Leans right further right than this Hedges 10 of 114 claims Outlet record 63/100
“The articles discuss different aspects of the trade conflict between Canada and the U.S., with Article A focusing on legal arguments against Trump's tariffs, while Article B discusses the impact of these tariffs on a specific Texas manufacturer.”
CBC News
⚖️ Leans right further right than this Hedges 0 of 3 claims Outlet record 74/100
“While both articles discuss actions by Trump regarding Canadian imports, Article A focuses on legal issues and previous tariff expansions, while Article B reports a new memorandum signed to remove Canadian products from U.S. federal procurement.”
The Straits Times
⚖️ Leans right further right than this Hedges 0 of 9 claims Outlet record 68/100
“While both articles discuss Trump's actions against Canadian goods, Article A focuses on legal issues regarding Section 338 tariffs and nondelegation doctrines, whereas Article B reports on a specific presidential memorandum directing agencies to remove Canadian goods from US government purchases.”
How this article was measured signals, leaning charts, publisher record, byline, topics and claims

Signals How these are calculated →

Claims extracted
28
sentences that state something as happening or true
Uncertain
7%
2 of 28 hedged ("reportedly", "may", "according to")
Leaning
Leans strongly left
of the writing, not the subject · beta estimate
Publisher signals
67/100
Reason's corrections and hedging, across everything collected from it. Not a measure of accuracy.
Outlets on this story
11
Politics
Same framing elsewhere
1
articles that frame the event the way this one does
Analyzed 2026-09-14 · how these are computed

How this is being covered How these are calculated →

Article leaning vs. publisher reliability
Source leaning vs. consistency

Publisher

Reason · 992 article(s) · 4 correction(s) detected
Running correction rate · 4 correction(s)

Who wrote this

Ilya Somin
22 article(s) here · 1 carrying a prediction
🔮 It also adopts a properly restrictive definition of "rebellion" (which is one of the conditions that might justify federalization of the National Guard).
🔮 Today, the Trump Justice Department filed a federal lawsuit seeking to block Alaska Senate election results on the grounds they might be influenced by voter "confusion" between incumbent Republican Senator Dan S. Sullivan and a separate Republican candidate with a very similar name (Dan L. Sullivan).
🔮 And I think he actually agrees with me more than the framing of his post might suggest.
2026-10-17 · assertive framing · Who Should Defend Democracy?
🔮 I would like to thank Matt for his interesting and insightful response.
🔮 [I]t seems to me that those who are fully onboard the expansion-or-bust train should have to do more than simply assert that having four new Democratic appointees on the Court in 2029 would be a self-evidently "good" thing.
🔮 The court ruled that federal law does not preempt these policies, and that if if it did, there would be a violation of the anti-commandeering requirements of the Tenth Amendment: Even were the Court to find that the United States has standing and the challenged provisions are preempted—both answered in the negative above—United States' claims would still fail because the anticommandeering doctrine of the Tenth Amendment to the Constitution of the United States precludes relief.
🔮 But some would like to revive it.
2026-10-15 · assertive framing · Fusionism and its Limits
🔮 I wish there was something I could say to ease the continuing pain of the victims of the attack and their families.
🔮 What would they make of that language?
2026-10-06 · assertive framing · Justice Alito on Originalism
🔮 And, as with tariffs, interpreting these authorities in a way that gives the president a blank check to impose import bans would run afoul of the major questions doctrine and constitutional nondelegation.
Also by Ilya Somin
Who Should Defend Democracy?
2026-10-17 · Reason
Nothing else under this byline is closely related to this article, so these are simply their most recent.
All 22 articles by Ilya Somin →

Topics

Canadian Section 338 Smoot-Hawley Trump the Great Depression

Subjects

Trump PERSON · 9× Canadian NORP · 3× Harrell PERSON · 2× Hillman PERSON · 2× Congress ORG · 1× Georgetown University ORG · 1× Hoover Institution ORG · 1× Jennifer Hillman PERSON · 1× Peter Harrell PERSON · 1× Philip Zelikow PERSON · 1×

Narrative

Since the Supreme Court issued that decision, Trump has repeatedly tried to use other legislation to achieve the same sweeping power: Section 122 of the Trade Act of 1974 (invalidated by the US Court of International Trade, though the case is on appeal), Section 301 of that same act (the issue is now being litigated), and now Section 338.
framing: assertive · carried by 1 article(s) · first seen 2026-09-14
🔮 In this post, I will explain how the legal case against these actions is bolstered by the major questions and nondelegation doctrines.

Claims (28 extracted, 2 hedged)

Mostly law professors | Sometimes contrarian | Often libertarian | Always independent I have previously written about Trump's harmful and illegal imposition of Section 338 tariffs against various Canadian imports, and his recent expansion of those actions to include categorical bans on some Canadian products. asserted
I → write → products
In this post, I will explain how the legal case against these actions is bolstered by the major questions and nondelegation doctrines. asserted
case → explain → questions
Section 338 was part of the infamous Smoot-Hawley tariff act of 1930, which gravely exacerbated the Great Depression. asserted
which → exacerbate → Depression
There is a strong case that Trump's Section 338 tariffs are illegal both because Section 338 (which has never been used previously) was superseded by later legislation, and because Trump's tariffs do not meet the textual requirements of Section 338. asserted
tariffs → be → Section
But assume it is unclear whether Section 338 has been superseded and whether the Trump tariffs on Canadian imports meet the requirements emphasized by Harrell and Hillman: that Section 338 tariffs must be in response to foreign trade polices that "discriminate" against US goods, and must "offset" those discriminatory policies. uncertain
that → assume → policies
In that event, the major questions doctrine (MQD) weighs against Trump's position. asserted
doctrine → weigh → position
MQD requires Congress to "speak clearly" when authorizing the executive to make decisions of "vast economic and political significance." asserted
MQD → require → significance
It played a major role in litigation against Trump's massive International Emergency Economic Powers Act (IEEPA) tariffs. asserted
It → play → tariffs
Bot the US Court of Appeals for the Federal Circuit (which has jurisdiction over all US tariff cases), and three Supreme Court justices struck down those tariffs in large part based on MQD. asserted
justices → have → MQD
Under the administration's interpretation of Section 338, it can be used to impose virtually unlimited tariffs against goods from almost any trading partner, so long as that government imposes any restrictions at all on American imports. asserted
government → use → imports
They would not have to be meaningfully discriminatory, and the Section 338 tariffs would not have to be "offsetting" in the sense of closely calibrated to the trading-partner restrictions they are supposed to be countering. asserted
they → have → restrictions
That kind of sweeping discretion over tariffs creates an obvious major question, inasmuch as it gives the president vast power over the US and world economies. asserted
it → create → US
And that power would not be limited to just US-Canada trade, though even the latter is extremely important, given that Canada is one of our biggest trading partners and the two economies are closely intertwined in many ways. asserted
economies → limit → ways
Trump's recent expansion of Section 338 restrictions further accentuates the "major" nature of the issues at stake. asserted
expansion → accentuate → stake
He has now used Section 338 to ban some imports entirely, as opposed to "merely" imposing tariffs. asserted
He → use → tariffs
Under the administration's interpretation of Section 338, the power to embargo goods would also be nearly unlimited, so long as the trading partner in question imposes at least some constraints on US imports, and doesn't lift them in response to initial Section 338 actions. asserted
partner → embargo → actions
And, as the analyses by Zelikow and Harrell and Hillman show, it is at the very least far from clear that Section 338 is still in force, and that it gives Trump the sweeping power he claims. uncertain
he → show → power
If courts conclude that Section 338 does somehow authorize Trump's actions, even in spite of MQD, they should strike it down under the nondelegation doctrine, which limits delegation of legislative power to the executive. asserted
which → conclude → executive
As the Supreme Court emphasized in the IEEPA case, tariffs are a congressional power, not an executive one. asserted
tariffs → emphasize → case
The power to ban imports entirely is also a congressional power, part of the authority to regulate international commerce. asserted
power → ban → commerce
But last year's decision in FCC v. Consumers' Research held that delegations of the power to impose taxes (including, presumably, tariffs) must have a clear floor and ceiling and that "[t]he guidance needed is greater when an agency action will affect the entire national economy than when it addresses a narrow, technical issue." asserted
it → hold → issue
And the authority claimed by the administration is obviously one that affects the "entire national economy." asserted
that → claim → economy
As the Supreme Court emphasized in the IEEPA case, the president is not supposed to have the power to "impose tariffs on imports from any country, of any product, at any rate, for any amount of time." asserted
president → emphasize → time
Trump's approach to Section 338 would give him exactly that. asserted
approach → give → that
Since the Supreme Court issued that decision, Trump has repeatedly tried to use other legislation to achieve the same sweeping power: Section 122 of the Trade Act of 1974 (invalidated by the US Court of International Trade, though the case is on appeal), Section 301 of that same act (the issue is now being litigated), and now Section 338. asserted
issue → issue → act
Courts should continue to reject these power grabs. asserted
Courts → continue → grabs
I hope that will soon change. asserted
that → hope → ?
And, when it does, the plaintiffs should make sure to make major questions and nondelegation arguments, in addition to other points. asserted
plaintiffs → do → points
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